diff --git a/frontend/src/ts/test/test-logic.ts b/frontend/src/ts/test/test-logic.ts
index 8cc997f90..56fd00d8b 100644
--- a/frontend/src/ts/test/test-logic.ts
+++ b/frontend/src/ts/test/test-logic.ts
@@ -617,7 +617,7 @@ export async function addWord(): Promise<void> {
 
       let wordCount = 0;
       for (let i = 0; i < section.words.length; i++) {
-        const word = section.words[i];
+        const word = section.words[i] as string;
         if (wordCount >= Config.words && Config.mode === "words") {
           break;
         }
diff --git a/frontend/src/ts/types/types.d.ts b/frontend/src/ts/types/types.d.ts
index b6bc9b98e..fe64adfae 100644
--- a/frontend/src/ts/types/types.d.ts
+++ b/frontend/src/ts/types/types.d.ts
@@ -108,6 +108,20 @@ declare namespace MonkeyTypes {
     | "changesWordsFrequency"
     | `wordOrder:${FunboxWordOrder}`;
 
+  class Wordset {
+    public words: string[];
+    public length: number;
+    constructor(words: string[]);
+    randomWord(mode: MonkeyTypes.FunboxWordsFrequency): string;
+  }
+
+  class Section {
+    public title: string;
+    public author: string;
+    public words: string[];
+    constructor(title: string, author: string, words: string[]);
+  }
+
   type FunboxFunctions = {
     getWord?: (wordset?: Wordset, wordIndex?: number) => string;
     punctuateWord?: (word: string) => string;